can help me with this inheritance object oriented programming exercise?

Exercise Topic 5: Inheritance Given the following super class named Hardware and subclass named Printer: a) Write the method definition for each of the following by implementing the inheritance concept: - Normal constructor for both super class and sub class - Processor method named calcSellprice () to calculate and return the selling price of a printer. The selling price for dot matrix, ink jet and laser printers are increased by 10%,15% and 20% from purchasing price respectively. - Processor method named order () to determine whether new printers should be ordered or not; based on number of items left in the stock, if the items left are less than 5 , then the order should be taken